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<div class="title">nrf51/Board/pca10000/button_radio_example/main_rx.c</div>  </div>
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<a href="pca10000_2button__radio__example_2main__rx_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * The information contained herein is confidential property of Nordic</span>
<a name="l00004"></a>00004 <span class="comment"> * Semiconductor ASA.Terms and conditions of usage are described in detail</span>
<a name="l00005"></a>00005 <span class="comment"> * in NORDIC SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * Licensees are granted free, non-transferable use of the information. NO</span>
<a name="l00008"></a>00008 <span class="comment"> * WARRANTY of ANY KIND is provided. This heading must NOT be removed from</span>
<a name="l00009"></a>00009 <span class="comment"> * the file.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> */</span>
<a name="l00012"></a>00012 
<a name="l00035"></a>00035 <span class="preprocessor">#include &lt;stdint.h&gt;</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &lt;stdbool.h&gt;</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include &quot;radio_config.h&quot;</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include &quot;nrf_gpio.h&quot;</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include &quot;boards.h&quot;</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &quot;<a class="code" href="simple__uart_8h.html" title="Simple UART driver.">simple_uart.h</a>&quot;</span>
<a name="l00041"></a>00041 
<a name="l00042"></a><a class="code" href="group__nrf__dev__button__radio__rx__example.html#ga5f53027c78fbb61b679d1fe898fc5134">00042</a> <span class="keyword">static</span> uint8_t <span class="keyword">volatile</span> <a class="code" href="group__nrf__dev__button__radio__rx__example.html#ga5f53027c78fbb61b679d1fe898fc5134" title="Received packet buffer.">packet</a>[4];  
<a name="l00043"></a>00043 
<a name="l00044"></a>00044 <span class="keywordtype">void</span> <a class="code" href="group__flashwrite__example.html#ga17fb021b480a1f220d2579807fa2e398">init</a>(<span class="keywordtype">void</span>)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046   <span class="comment">/* Start 16 MHz crystal oscillator */</span>
<a name="l00047"></a>00047   NRF_CLOCK-&gt;EVENTS_HFCLKSTARTED = 0;
<a name="l00048"></a>00048   NRF_CLOCK-&gt;TASKS_HFCLKSTART = 1;
<a name="l00049"></a>00049 
<a name="l00050"></a>00050   <span class="comment">/* Wait for the external oscillator to start up */</span>
<a name="l00051"></a>00051   <span class="keywordflow">while</span> (NRF_CLOCK-&gt;EVENTS_HFCLKSTARTED == 0) 
<a name="l00052"></a>00052   {
<a name="l00053"></a>00053   }
<a name="l00054"></a>00054 
<a name="l00055"></a>00055   <span class="comment">// Turn peripherals on</span>
<a name="l00056"></a>00056   <span class="comment">// Power on the PPI peripheral</span>
<a name="l00057"></a>00057   NRF_POWER-&gt;PERPOWER |= (POWER_PERPOWER_PPI_Power &lt;&lt; POWER_PERPOWER_PPI_Pos);
<a name="l00058"></a>00058 
<a name="l00059"></a>00059   <span class="comment">// Wait for the power up</span>
<a name="l00060"></a>00060   <span class="keywordflow">while</span> ((NRF_POWER-&gt;PERRDY &amp; POWER_PERRDY_PPI_Msk) != (POWER_PERRDY_PPI_Ready &lt;&lt; POWER_PERRDY_PPI_Pos))
<a name="l00061"></a>00061   {
<a name="l00062"></a>00062   }
<a name="l00063"></a>00063 
<a name="l00064"></a>00064   <span class="comment">// Power on the Radio</span>
<a name="l00065"></a>00065   NRF_POWER-&gt;PERPOWER |= (POWER_PERPOWER_RADIO_Power &lt;&lt; POWER_PERPOWER_RADIO_Pos);
<a name="l00066"></a>00066 
<a name="l00067"></a>00067   <span class="comment">// Wait for power up</span>
<a name="l00068"></a>00068   <span class="keywordflow">while</span> ((NRF_POWER-&gt;PERRDY &amp; POWER_PERRDY_RADIO_Msk) != (POWER_PERRDY_RADIO_Ready &lt;&lt; POWER_PERRDY_RADIO_Pos))
<a name="l00069"></a>00069   {
<a name="l00070"></a>00070   }
<a name="l00071"></a>00071 
<a name="l00072"></a>00072   <span class="comment">// Set radio configuration parameters</span>
<a name="l00073"></a>00073   radio_configure();
<a name="l00074"></a>00074 
<a name="l00075"></a>00075   <span class="comment">// Set payload pointer</span>
<a name="l00076"></a>00076   NRF_RADIO-&gt;PACKETPTR = (uint32_t)<a class="code" href="group__nrf__dev__button__radio__rx__example.html#ga5f53027c78fbb61b679d1fe898fc5134" title="Received packet buffer.">packet</a>;
<a name="l00077"></a>00077 
<a name="l00078"></a>00078   <a class="code" href="group__nrf__drivers__simple__uart.html#ga15ab88a2172a5ea02ff41ae9711bc0af">simple_uart_config</a>(RTS_PIN_NUMBER, TX_PIN_NUMBER, CTS_PIN_NUMBER, RX_PIN_NUMBER, HWFC);
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 
<a name="l00085"></a><a class="code" href="group__nrf__dev__button__radio__rx__example.html#ga840291bc02cba5474a4cb46a9b9566fe">00085</a> <span class="keywordtype">int</span> <a class="code" href="group__gpio__example.html#ga840291bc02cba5474a4cb46a9b9566fe">main</a>(<span class="keywordtype">void</span>)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087   <a class="code" href="group__flashwrite__example.html#ga17fb021b480a1f220d2579807fa2e398">init</a>();
<a name="l00088"></a>00088   <a class="code" href="group__nrf__drivers__simple__uart.html#ga76e6bde269950e02affbff121c79d408">simple_uart_putstring</a>((<span class="keyword">const</span> uint8_t *)<span class="stringliteral">&quot;Press Button 0 or Button 1 on the transmitter\n\r&quot;</span>);
<a name="l00089"></a>00089   <span class="keywordflow">while</span>(<span class="keyword">true</span>)
<a name="l00090"></a>00090   {
<a name="l00091"></a>00091     NRF_RADIO-&gt;EVENTS_READY = 0U;
<a name="l00092"></a>00092     <span class="comment">// Enable radio and wait for ready</span>
<a name="l00093"></a>00093     NRF_RADIO-&gt;TASKS_RXEN = 1U;
<a name="l00094"></a>00094     <span class="keywordflow">while</span>(NRF_RADIO-&gt;EVENTS_READY == 0U)
<a name="l00095"></a>00095     {
<a name="l00096"></a>00096     }
<a name="l00097"></a>00097     NRF_RADIO-&gt;EVENTS_END = 0U;
<a name="l00098"></a>00098     <span class="comment">// Start listening and wait for address received event</span>
<a name="l00099"></a>00099     NRF_RADIO-&gt;TASKS_START = 1U;
<a name="l00100"></a>00100     <span class="comment">// Wait for end of packet</span>
<a name="l00101"></a>00101     <span class="keywordflow">while</span>(NRF_RADIO-&gt;EVENTS_END == 0U)
<a name="l00102"></a>00102     {
<a name="l00103"></a>00103     }
<a name="l00104"></a>00104     <span class="comment">// Write received data to LED0 and LED1 on CRC match</span>
<a name="l00105"></a>00105     <span class="keywordflow">if</span> (NRF_RADIO-&gt;CRCSTATUS == 1U)
<a name="l00106"></a>00106     {
<a name="l00107"></a>00107       <span class="keywordflow">switch</span>(<a class="code" href="group__nrf__dev__button__radio__rx__example.html#ga5f53027c78fbb61b679d1fe898fc5134" title="Received packet buffer.">packet</a>[0])
<a name="l00108"></a>00108       {
<a name="l00109"></a>00109         <span class="keywordflow">case</span> 1:
<a name="l00110"></a>00110           <a class="code" href="group__nrf__drivers__simple__uart.html#ga76e6bde269950e02affbff121c79d408">simple_uart_putstring</a>((<span class="keyword">const</span> uint8_t *)<span class="stringliteral">&quot;Button 0 pressed\n\r&quot;</span>);
<a name="l00111"></a>00111           <span class="keywordflow">break</span>;
<a name="l00112"></a>00112 
<a name="l00113"></a>00113         <span class="keywordflow">case</span> 2:
<a name="l00114"></a>00114           <a class="code" href="group__nrf__drivers__simple__uart.html#ga76e6bde269950e02affbff121c79d408">simple_uart_putstring</a>((<span class="keyword">const</span> uint8_t *)<span class="stringliteral">&quot;Button 1 pressed\n\r&quot;</span>);
<a name="l00115"></a>00115           <span class="keywordflow">break</span>;
<a name="l00116"></a>00116 
<a name="l00117"></a>00117         <span class="keywordflow">case</span> 3:
<a name="l00118"></a>00118           <a class="code" href="group__nrf__drivers__simple__uart.html#ga76e6bde269950e02affbff121c79d408">simple_uart_putstring</a>((<span class="keyword">const</span> uint8_t *)<span class="stringliteral">&quot;Both buttons pressed\n\r&quot;</span>);
<a name="l00119"></a>00119           <span class="keywordflow">break</span>;
<a name="l00120"></a>00120       }
<a name="l00121"></a>00121     }
<a name="l00122"></a>00122     NRF_RADIO-&gt;EVENTS_DISABLED = 0U;
<a name="l00123"></a>00123     <span class="comment">// Disable radio</span>
<a name="l00124"></a>00124     NRF_RADIO-&gt;TASKS_DISABLE = 1U;
<a name="l00125"></a>00125     <span class="keywordflow">while</span>(NRF_RADIO-&gt;EVENTS_DISABLED == 0U)
<a name="l00126"></a>00126     {
<a name="l00127"></a>00127     }
<a name="l00128"></a>00128   }
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 
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